Joshua hendy



(No Model.)

J. HENDY. Ore Feeder.

No. 235,872. Patented Dec. 28,1880.

LITIIOGRAPHER, wAsmNGTcN D c j UNITED STATES PATENT. OFF CE.

JOSHUA HENDY, OF SAN FRANCISCO, CALIFORNIA.

ORE-FEEDER.

SPECIFICATION forming part of Letters Patent No. 235,872, dated December28, 1880.

I Application filed March 27, 1880. (No model.)

' clear, and exact description thereof, reference elevation of myimproved ore-feeder.

the hopper.

being had to the accompanying drawings.

My invention relates to certain improvements in machines for feeding oreto stampmills; and it consists, first, of an adjustable gage attachmentfor regulating the feed of the ore in its passage from the hopper to thetray or ore-table, all as hereinafter more fully described.

For the purpose of this application I have represented my improvementsas applied to the automatic orefeeder for which Letters Patent No.148,597 were issued to Thomas A. Gochrane on the 1 7 thday of March,1874; but the adjustable gage attachment can be applied to any of theautomatic orefeeders in use, while the device for rotating the oretableis only applicable to such machines as have a rotary feeding device.

Referring to the drawings, Figure l is a side Fig. 2 is a frontelevation of the same. Fig. 3 is a top view of the feeding table and thelower part of the ore-hopper removed from the frame of the machine. Fig.4is a detail view, in vertical section, of the frictional feed.

A is the hopper, and B the ore-table, of an automatic ore-feeder. Theore which is dumped into the hopper settles down upon the tray,

and an opening is made in the front side of The tray has an approximateangle of inclination of about forty-five degrees, to cause the ore torest thereon in a position to promote the feeding of the ore therefrom.This permits the ore in the hopper to settle downward as fast as the oreon the tray or table is fed into the battery. The angle which the pileof ore that rests on the table or tray mustassume varies according tothe character of the ore being fed-that is, if the ore is per fectly drythe angle must be less steep than if it is damp or wet. Thisnecessitates increasattach men t.

plate, 0, which is provided with a longitudinal slot, d, extending aportion of its length. This bar or plate I secure vertically to thefront side of the hopper by a binding-screw, e, which passes through theslot and into the front of the hopper, so that when the screw is setdown against the bar or plate it will hold the bar or plate firmly inplace. When the binding-screw is loosened the bar or plate can beadjusted up or down a distance equal to the length of the slot, andsecured in any desired position. :To the lower end of this bar or plateI attach a cross bar or plate, f, by means of a bindingscrew, 9. Thisbar or plate I can place horizontally or at any desired angle, andsecure it in either position by means of the screw g. This cross bar orplate can, therefore, be adjusted across the opening in the front of thehopper in any desired position, so as to increase or diminish the heightof the opening, according to the character of the ore in the hopper, orit can be placed at an angle in either direction, so as to increase thesize of the openin g on one side or diminish it on the other side. Thisgives me complete control of the feed of the ore from the hopper to thetray or table, which is one of the most important features in anore-feeder.

H is the shaft which drives the rotary ore table or feeder. ()n thisshaft I secure aplainfaced wheel, I, as a driver.

J is a casting, which has a recess in it, in which one-half of the wheelI will fit. One end of this casting is journaled on the shaft H, asrepresented, while its opposite end is suspended by a rod, K, from thetappet-lever L, so that the casting stands horizontally. An inclinedrecess, m, is made in this casting opposite the face of the wheel I,inwhich recess I place a small steel .roller, 0, so thatwhen the rollerdrops to the bottom of the inclined recess it will bite against the faceof the wheel. Now, when the outer end of the tappet-lever L is depressedby the blow of the tappet on the stampstem, the upward motion of theopposite end of the lever raises the outer end of the casting J, causingthe wheel I to be partially rotated by the gripe of the steel rolleragainst its face. As the outer endof thecasting drops downward again therolleris forced up into the wider part of the recess, ready to drop downand bind again the instant the tappet strikes thelever again. This givesapositive feed, and the amount of rotation communicated to the Wheel isexactly in proportion to the depression of the outer end of the lever L.This is what is called a friction ratchet feed. The recess in which theroller moves is covered over by a slide to prevent the entrance of dustand dirt.

The lever L has its fulcrum in a hanger, P;

which forms part of a casting, Q. This castin g is attached to the sideof the feeder-frame, and has a bracket, 1', projecting from it directlyover the lever L. A setscrew, 8, passes down through the bracket, sothat the lever will strike the lower end of the screw when it reboundsafter being depressed by the tappet. The screw can be adjusted up ordown in order to shorten or lengthen the stroke of the lever, and thusregulate the feed of the ore.

Heretofore the lever L has been secured in the hanger by a pin or bolt;but for convenience in throwing thefeeder out of action I simply make ahole through the hanger or block, through which the lever passes. Thebottom of this hole I make in the form of an inverted V, and in theunder side of the lever, at the proper point,lmake a V-shaped notch,which will straddle the V-bottom, and thus form a sufficient attachmentand hearing, which can be readily unshipped when desired.

Having thus described my invention, what I claim, and desire to secureby Letters Patcut, is-- v The adjustable gage attachment for regulatingthe feed of ore from the hopper to the tray or table B, consisting ofthe verticallyadjustable bar or plate 0, with its adj ustable cross baror plate f, substantially as specified.

In Witness whereof I have hereunto set my hand and seal.

JOSHUA HENDY. [L. s.]

Witnesses:

WM. F. CLARK, EDWARD E. OsBoRN.

